Rail-sanding device



` June 16, '1925. `1,5'41;,934.

c. c. FARMER RAIL sANDliNG inEvIcE m'Filed Jam. e 192:5

yINVENTOR BY j AUORN;

Patented June 16, 1925.

onYDE o.

FARMER, orriarsnonerr, PENNSYLVANIA, AssIeNon rro" trrinwnsrcnel House4 AIR nmixnfcoiarsn, orfWiLMnnnrNc-i, rnNnsYiivANin,"A'cofaomnrron RAIL-SANDING IDBPVLCI).`

Application lectzmanuary Gylw `'Serial No. 611,0,

To cZZvwicmiz/L may concern-fv i Be itknofwn that I, CLYDE C. FARMER, a f citizen ofthe United States, residing at Pittsburgh, `in the county of Allegheny and 6 State otienusyhania, have invented new andl usetul Improvements iu Rail-tiamina Devi@ s, oflivhich the following is speci e cation. 1, t y i i This invention relates to a sanding device for controlling the 'supplyoiI sand "to raluvayrails inorder tot. provide traction for the wheels of railway vehicles. t

i One obiectof my` invention is to provide an improvediiuidvp-rcssurc operated valve device ioiwcontirolling the. Supply of sand forsanding theirails. i i t. i Another object le to providea fluid proef sure `oplnated sand` valve; devict-i` adapted to be controllednby "the, movement of au gincens brake valve. i i In the accompanying drawing, Ei 1 a diagrammatic view of an engineers brakev valve associated with' a! *Huid pressure operated sanding valve device in accordance with my invention. F ig. 2 a sectional view of the brake valve device in a position other than emergency position; and F ig. 3 a sectional View of the brake valve device in emergency application position.

s shown in the drawing, the sand valve device may comprise a casing 1 having a piston chamber 2, containing a piston 3 and having a chamber 4 containing a. valve 5 adapted to be operated by piston 3 and provided with a guide stem 19 having grooves 20 through which communication is established from valve chamber a to chamber 21 when valve 5 is off its seat. Mounted in a central bore of the valve 5 is a valve 6 having its stem slotted to receive a pin 7 and subject to the pressure of a. coil spring 8.

The valve 6 controls communication fronl the main reservoir 9 through pipe 1() toa sand reservoir 11 and valve 5 controls com-- munication from the reservoir 11 to a pipe 12, through which fluid under pressure is supplied to effect the sanding of the rail- Way rails in the Well known manner hereto'fore employed but Which is not shown, since the same forms no part of my present invention.

The piston chamber 2 is connected by a pipe 13 to an engineers brake valve dete the. net-,on chamber 2.; s b

vice 1.4 and said brake valve is provided with rctaryvalve 17 `leaning-a portY 1?. adapted 11,1 the emereencyapnicaticn tlon of the brake` 'valve device to, 'Supply Huid, undcrwpreseule through eine lav-tc the, piston. chamber as shown Fig-3., While in thccther positions of' the brake valve shown in. 'Fig-V 2,1311@ brake valve Connectienftc :the piston chamber a blacked; A restricted port 1 5. opens from the platea chamber 2te the atmosphere, so that' when the. brakevalvefis i111 a position other than emergency position,- the pistmn ehetnherifwvill be vented te the atmosphere .-1,11. Opetetenrvheu the brake valve device 1S. 1n any position except emergency annin @etwa noeltion; tliciblalie valve connection s .leaked and since pieton chamber 2` is the opent to the annos-` phele-lQ-Y ver 0f the restricted port 15, the valve 5 will bei held to its seat by a spring, lt?. When valve 5 is seated, thevalve 6 will he lilfted ,from its Seat bythe piu 7, .so that iiuid under pressure will be supplied from the main reservoir 9 through pipe 10 to the sand reservoir 11, charging said reservoir With fluid under pressure at main reservoir When the brake valve is turned to emergency application position, fluid under pres sure is supplied by the brake valve to the piston chamber 2 at a much greater rate than it can escape through the restricted port 15, and piston 3 is thereby operated to lift the valve 5 from its seat, at the same time closing the valve 6. Fluid under pressure is then supplied from the sand reservoir 11 to the sand pipe 12 so as to eii'ect the sanding of the rails. The sanding continues until the pressure in the reservoir 1l is exhausted. Y

lrVhen the brake valve is turned from emergency position, fluid is vented from piston chamber 2 through the restricted port 15 and the spring 16 then returns valve 5 to its seat and the valve 6 is lifted from its seat, so that the sand reservoir 11 is again charged With iiuid under pressure from the main reservoir in readiness for another operation.

The arrangement of valve 6 with the slot and pin connection permits the unseating of valve 5 without driving the valve 6 to its seatV 4lili vso with damaging force such as to injure same, since the spring 8 acts as a cushion for .the valve 6 While it is moving to its seat.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

l.' The combination With a source of fluid under pressure and a reservoir7 of a sand valve device comprising a valve for controlling the supply of fluid from said reservoir to effect the sanding of the rails7 a valve for controlling the supply of fluid from said source of fluid under pressure to said reservoir, and a piston operated by fluid under pressure for operating said valves.

2. The combination With a source of' fluid under pressure and a reservoir, of a sand valve device comprising a valve for controlling the supply of fluid from said reser- Voir to effect the sanding of the rails, a spring pressed valve mounted in said controlling valve'for controlling the supply of fluid from said source of fluid under pressure to said reservoir7 and a piston for operating said valve.

3. The combination With a source of fluid under pressure and a reservoir, of a valve for supplying fluid from said source to said reservoir, a valve for controlling the supply otl fluid from said reservoir for effecting the sanding of the rails, and a piston operated by fluidunder pressure for opening the first mentioned valve and for closing the second mentioned valve.

4. The combination With a brake valve device and a reservoir, of a valve device operated by fluid under pressure upon movement of said brake valve device to one position for supplying fluid under pressure from said reservoir to effect the sanding of the rails and operated by reduction in fluid pressure upon movement of the brake valve device to another position for supplying fluid under .pressure to said reservoir.

5. The combination With a brake valve device and a reservoir normally charged With fluid under pressure, of a valve device operated by fluid under pressure supplied from the brake valve device in emergency application position for supplying fluid under pressure from said reservoir to effect the sanding of the rails and operated by reduction in fluid pressure upon movement of the brake valve device to another position for supplying fluid under pressure to said reservoir.

6. The combination With a brake valve device, a reservoir, and a source of fluid under pressure, of a valve device comprising a valve for controlling the supply of fluid from said source to said reservoir, a valve for controlling the supply of fluid from said reservoir to effect the sanding of the rails, and a piston operated by fluid under pres sure supplied by the brake valve device in one position for operating said valves.

1n testimony whereof I have hereunto set my hand.

CLYDE C. FARMER. 

